Isaac misses his friend

My sweet Isaac, oh where to begin. He is in preschool this year at the most wonderful school. It's the kind of place that wraps you in its arms the second you walk through the door, it's been such a huge blessing for our family to have him there. Isaac has an extremely hard time in social settings, he tends to be very shy and he tends to isolate himself and suffers with anxiety and over stimulation (he's been seeing a doctor for it since last spring). At the beginning of this school year a sweet little girl named Savannah took him under her wing and they became the best of friends. She was his first friend ever, and he need her so very much. Each day he had school he would jump up and get ready as fast as he could so he could get to school to see her, she was the reason he liked school so much. She taught him how to play games, share toys and play with the other children. To me she was an angel. Her mom and I began planning play dates on a regular basis, it's like they just couldn't get enough of each other, it was so sweet. Well S's dad is an opthemologist and he took a job in Utah, so over Christmas break their family moved. My Isaac has been devastated ever since. Each day he asks if he has school and pouts when I tell him yes, and now most of the time gives me such a hard time when I try to leave him there. He has other wonderful classmates who want to be his friend and a wonderful teacher but he misses his friend so very much and I do too. It's such a hard thing as a mother to see your children hurting, and in your heart knowing that there isn't anything you can do to help them, only time will heal Isaac's heart.